public async Task <long> Handle(GetLastVisitedLessonQuery request, CancellationToken cancellationToken)
{
var lastVisited = await _context.LastVisitedLessons
.AsNoTracking()
.Where(x => x.CourseId == request.CourseId && x.UserId == _currentUser.UserId)
.FirstOrDefaultAsync(cancellationToken);
if (lastVisited == null)
{
lastVisited = new LastVisitedLessonEntity
{
CourseId = request.CourseId,
UserId = _currentUser.UserId,
LessonId = (await _context.Courses
.Where(x => x.Id == request.CourseId)
.Include(x => x.Modules)
.ThenInclude(y => y.Lessons)
.FirstOrDefaultAsync(cancellationToken)).Modules.First().Lessons.First().Id
};
await _context.LastVisitedLessons.AddAsync(lastVisited, cancellationToken);
await _context.SaveChangesAsync(cancellationToken);
}
return(lastVisited.LessonId);
}
public async Task <LessonWithoutAnswersResponse> Handle(GetLessonWithoutAnswersQuery request, CancellationToken cancellationToken)
{
var courseId = (await _context.Lessons
.AsNoTracking()
.Where(x => x.Id == request.LessonId)
.Include(x => x.Module)
.FirstOrDefaultAsync(cancellationToken)).Module.CourseId;
var subscribed =
await _context.Subscriptions.AnyAsync(
x => x.SubscriberId == _currentUser.UserId && x.CourseId == courseId, cancellationToken);
if (!subscribed)
{
throw new NotImplementedException();
}
var lesson = await _context.Lessons
.AsNoTracking()
.Where(x => x.Id == request.LessonId)
.Include(x => x.Sections).ThenInclude(z => z.Quiz).ThenInclude(y => y.Questions).ThenInclude(c => c.Answers)
.Include(x => x.Sections).ThenInclude(z => z.Quiz).ThenInclude(y => y.Attempts)
.Include(x => x.Comments).ThenInclude(z => z.Author)
.Include(x => x.Comments).ThenInclude(z => z.UsersLikes)
.Include(x => x.Comments).ThenInclude(z => z.Replies).ThenInclude(y => y.Author)
.Include(x => x.Comments).ThenInclude(z => z.Replies).ThenInclude(y => y.UsersLikes)
.FirstOrDefaultAsync(cancellationToken);
if (lesson == null)
{
throw new NotImplementedException();
}
var progress = await _context.Progresses
.AsNoTracking()
.Where(x => x.LessonId == request.LessonId && x.UserId == _currentUser.UserId)
.FirstOrDefaultAsync(cancellationToken);
if (progress == null)
{
throw new NotImplementedException();
}
progress.IsVisited = true;
_context.Progresses.Update(progress);
var lastVisited = await _context.LastVisitedLessons
.AsNoTracking()
.Where(x => x.CourseId == courseId && x.UserId == _currentUser.UserId)
.FirstOrDefaultAsync(cancellationToken);
if (lastVisited == null)
{
lastVisited = new LastVisitedLessonEntity
{
CourseId = courseId,
UserId = _currentUser.UserId,
LessonId = lesson.Id
};
await _context.LastVisitedLessons.AddAsync(lastVisited, cancellationToken);
}
else
{
lastVisited.LessonId = lesson.Id;
_context.LastVisitedLessons.Update(lastVisited);
}
var sections = lesson.Sections.Where(x => x.Type == LessonSectionType.Quiz).ToList();
foreach (var section in sections)
{
section.Quiz.MaxAttempts -= section.Quiz.Attempts.Count;
}
await _context.SaveChangesAsync(cancellationToken);
return(_mapper.Map <LessonEntity, LessonWithoutAnswersResponse>(lesson));
}
